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space wheel MWI_690x364

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Magnetic Bearing Momentum and Reaction Wheel (MWI)

MWI 30-400/37, MWI 100-100/100

Overview

The Rockwell Collins momentum and reaction wheel with magnetic bearing allows for higher system performance, with low vibration/noise and gimballing capability.

Our Teldix space wheels are available with an angular momentum storage capacity spanning a range between 0.04 and 68 Nms. The wheels accommodate the requirements of attitude control systems for spacecraft weighing between 30 and 7,000 kg.

Time-tested technology. It's what you can expect from Rockwell Collins. With more than 30 years of experience in space wheel technology, we offer you Teldix space wheels that have more than 4,700 accumulated years of in-orbit operational time - far exceeding competing products.

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Contacts

Technical Support
Space Wheels
49-0-6221-512-275 Email

Features & Benefits
Specifications
Typical System
Related Documents
Training
Services & Support

Key Features & Benefits

  • Very low noise
  • An expected lifetime of more than 20 years
  • High torque
  • Controls a satellite in more than one axis with a single wheel only
  • Digitally controlled
  • Rad-hard or COTS electronics
  • Rotor gimballing capacity of ±1.7°
  • Adaptive interfaces (e.g., CAN, RS 485,RS 422)
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Performance
Physical Specs
Power
Environmental
MWI 100-100/100
MWI 30-400/37

Angular Momentum at Nominal Speed

100 Nms

Operational Speed Range at Nominal Speed

± 10,000 rpm

Speed Limiter

± 10,100 rpm

Safe Speed

15,000 rpm

Motor Torque at Nominal Speed

± 100 mNm

Rotor Gimballing Capacity

 

     Transverse momentum at nominal speed

3.0 Nms

     Gimballing angle around spin axis

± 1.7 °

     Gimballing torque

± 3 Nm (for speeds > 2,000 rpm)

     Resolution of automaticspin axis adjustment (software controlled)

0.002°

Imbalance

 

     Static

< 0.08 gcm

     Dynamic

< 1 gcm2

Angular Momentum at Nominal Speed

30 Nms

Operational Speed Range at Nominal Speed

± 3,700 rpm

Speed Limiter

± 8,100 rpm

Safe Speed

12,000 rpm

Motor Torque at Nominal Speed

± 400 mNm

Rotor Gimballing Capacity

 

     Transverse momentum at nominal speed

0.9 Nms

     Gimballing angle around spin axis

± 1.7 °

     Gimballing torque

± 3 Nm (for speeds > 2,000 rpm)

     Resolution of automaticspin axis adjustment (software controlled)

0.002°

Imbalance

 

     Static

< 0.08 gcm

     Dynamic

< 1 gcm2

MWI 100-100/100
MWI 30-400/37

Dimensions

 

     Diameter

< 300 mm

     Height

< 150 mm

     Mass

< 16.5 kg

Dimensions

 

     Diameter

< 300 mm

     Height

< 150 mm

     Mass

< 15.3 kg

MWI 100-100/100
MWI 30-400/37

Power Consumption

 

     Steady state at 0 rpm

< 10 W

     Steady state at nominal speed

< 35 W

     Maximum torque at nominal speed

< 300 W

     Additional power for rotor gimballing

Maximum 180 W

Power Interface

 

     Supply voltage

23 to 37 (optional 50)
VDC (unregulated)

     Maximum permitted in rush current

< 20 A

Signal Interface

 

     RS 232

COTS electronics

     RS 422/RS 485

COTS or rad-hard electronics

Power Consumption

 

     Steady state at 0 rpm

< 10 W

     Steady state at nominal speed

< 20 W

     Maximum torque at nominal speed

< 300 W

     Additional power for rotor gimballing

Maximum 180 W

Power Interface

 

     Supply voltage

23 to 37 (optional 50)
VDC (unregulated)

     Maximum permitted in rush current

< 20 A

Signal Interface

 

     RS 232

COTS electronics

     RS 422/RS 485

COTS or rad-hard electronics

Temperatures

 

     Acceptance level

-40 to +70 °C

     Survival/non-operating level

-55 to +85 °C

Vibration Launch (Locked for Launch)

 

     Axial

18 grms

     Radial

13 grms

Vibration Operational

 

     Axial

0.3 grms

     Radial

0.5 grms

Lifetime

20 years (in-orbit)

Reliability

(PRISM, COTS electronics only)

Radiation Safeguarding

COTS electronics shielded by 25 mm Al equivalent, equipped with EDAC, LU-protection. Optional: rad-hard electronics

Temperatures

 

     Acceptance level

-40 to +70 °C

     Survival/non-operating level

-55 to +85 °C

Vibration Launch (Locked for Launch)

 

     Axial

18 grms

     Radial

13 grms

Vibration Operational

 

     Axial

0.3 grms

     Radial

0.5 grms

Lifetime

20 years (in-orbit)

Reliability

(PRISM, COTS electronics only)

Radiation Safeguarding

COTS electronics shielded by 25 mm Al equivalent, equipped with EDAC, LU-protection. Optional: rad-hard electronics

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Main Components

Please contact Rockwell Collins for additional information on this product.

Please contact Rockwell Collins for additional information on this product.

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Publications

Technical documentation is developed to your requirements for the operation and maintenance of your product.

Contact us for information.

Our instructional design specialists and staff of experienced instructors develop and support solutions to meet your operator and maintenance training requirements. We offer a host of solutions to maximize your investment. On-site and customized training are available.

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Tailored Services
Rockwell Collins facilities and capabilities allow us to offer a variety of support solutions from time and material repairs to fully integrated performance based logistics.

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